* {
  margin: 0;
  padding: 0;
}

html {
  display: table;
  height: 100%;
  width: 100%;
  font-family: sans-serif;
}

body {
  padding: 10px;
}

body.home {
  display: table-cell;
  vertical-align: middle;
  text-align: center;
  padding: 0;
}

a {
  text-decoration: none;
  color: deepskyblue;
}

a:hover {
  color: orange;
}

ul, ol {
  padding: 0 0 0 30px;
}

ul.menu {
  position: absolute;
  top: 0;
  left: 0;
  height: 32px;
  padding: 0;
}

ul.menu > li {
  list-style: none;
  display: block;
  float: left;
  width: 100px;
  height: 32px;
  position: relative;
  margin-left: 5px;
}

ul.menu > li:first-child {
  margin-left: 0;
}

ul.menu > li > a {
  display: block;
  width: 100px;
  height: 32px;
  line-height: 32px;
  text-align: center;
  background-color: #ddd;
  font-size: 18px;
  position: relative;
  z-index: 2;
}

ul.menu > li:hover > a,
ul.menu > li.active > a {
  background-color: #aaa;
  color: #fff;
  border-bottom: 5px solid #aaa;
}

ul.menu ul {
  background-color: #aaa;
  position: absolute;
  top: 37px;
  left: 0;
  z-index: 1;
  width: 130px;
  padding: 0 10px 10px;
  text-align: left;
  display: none;
  border-radius: 0 5px 5px 5px;
  box-shadow: 2px 2px 3px rgba(0, 0, 0, 0.5); 
}

ul.menu > li:hover ul {
  display: block;
}

ul.menu ul > li {
  list-style: none;
  display: block;
  font-size: 14px;
  line-height: 20px;
}

ul.menu ul > li > a {
  color: #fff;
}

ul.menu ul > li > a:hover {
  color: #ff0;
}

body.home > div {
  width: 400px;
  height: 200px;
  background-color: #ddd;
  position: relative;
  margin: auto;
}

body.home > div > ul.menu {
  background-color: #fff;
  width: 100%;
  overflow: hidden;
}

body.home > div > iframe {
  width: 400px;
  height: 168px;
  position: absolute;
  top: 32px;
  left: 0;
  border: 0;
  display: none;
  background-color: #aaa;
}

body.home > div > iframe:target {
  display: block;
}